Influence of disorder on the magnetic properties of FeAl alloys: theory

Self-consistent electronic calculations are performed by means of the tight binding linear muffin tin orbital (TB-LMTO) method to study the influence of disorder on the magnetic properties of ordered Fe50Al50 and Fe75Al25 alloys. The calculations indicate that in these alloys the disordering of the structure increases the mean magnetic moment of the alloys, which is larger in the case of the Fe50Al50 alloy. The disordering of the alloy also causes an increase of the lattice parameter in relation to the ordered structures.